I was wondering - there are so many threads on NFP lately. What if a couple is married and has been told to use condoms b/c one or both members has a sexually transmitted disease? Whether the disease is generally transmitted through sexual contact, like herpes (which cannot be cured), or if it is transmitted through blood-to-blood contact with a risk through (even 'ordinary') sex.
Suppose someone has a condition that could be spread through sexual contact, and can't be cured, and this happens before they are married. What about contraceptives? Is it different if the person got an STD from sexual assault, or blood transfusion? (that can happen). What about after the marriage?
I'm wondering what the Church says about this b/c I've been told by my gyn that stds that require at least periodic use of condoms are a lot more common than many people think they are, and it's an issue in my family.